TPS7A16A-Q1: RC circuit needed on Enable pin so that ESD cell is not activated or damaged

Jared Becker

Part Number: TPS7A16A-Q1

Hi Team,

When using the TPS7A1601A-Q1, should an RC filter be implemented between the driving source and the EN pin?

Some regulators require an RC circuit at the EN pin to slow down the voltage driving the enable pin because a high slew rate can activate the ESD cell on that pin and cause the regulator not to turn on. Additionally, without an RC filter at the EN pin, I have heard that the ESD structure can be damaged due to high current or false triggering may occur during surge testing.

Please let me know if this needs to be considered for this device.

Thank you!

Jared

over 4 years ago

0 Stephen Ziel over 4 years ago

TI__Mastermind 29180 points

Hi Jared,

I am working on your question and will reply within 2 business days.

- Stephen

0 Jared Becker over 4 years ago in reply to Stephen Ziel

TI__Genius 11495 points

Hello Stephen,

Any update on this?

Thanks,

Jared

0 Stephen Ziel over 4 years ago in reply to Jared Becker

TI__Mastermind 29180 points

Hi Jared,

This post will be the same for both of your recent questions.

There is no rated fired ESD cell information on either datasheet, and we have not come across this concern with these linear regulators before.
What dV/dt rates are you seeing going into the enable pin?

Thanks,

- Stephen

0 Jared Becker over 4 years ago in reply to Stephen Ziel

TI__Genius 11495 points

Hi Stephen,

Thank you for the insight. I do not have insight to the specific dV/dt rates being applied, I just want to ensure that an RC circuit is not recommended. This is a good thing, I just wanted to verify.

Thanks!

Jared

Power management

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TPS7A16A-Q1: RC circuit needed on Enable pin so that ESD cell is not activated or damaged